von orth



(No Model.) 2 Sheets-Sheet 1. L. VON ORTH. ELECTRIC SYNOHRONIZER FORCLOCKS No. 522,724.

Patented July 10, 1894.

Inventor:

Wiamasses:

LudwigvonOcih m (No Model.) 2 Sheets-Sheet 2. L. VON ORTH. ELECTRICSYNGHRONIZER FOR CLOCKS. No. 522,724.

Patented July 10, 1894.

INVENTORI Lu dwig mm Orck, BY

WITNESSES an UNITED STATES PATENT CFFIGE.

LUDWIG VON ORTH, OF BERLIN, GERMANY.

ELECTRIC SYNCHRONIZER FOR CLOCKS.

SPECIFICATION forming part of Letters Patent No. 522,724, dated July 10,1894. Application filed May 6,1892. Serial No, 43Z,05 8| (No model.

To aZZ whom it may concern.-

Be it known that I, LUDWIG VON ORTH, a subject of the King ofWViirtemberg, residing at Berlin, in the Kingdom of Prussia,Germany,have invented new and useful Improvements in Synchronizers forClocks, of which the following is a specification.

My invention has for its object to synchronize electrically from astandard or master clock; a series of secondary clocks regulated to runfast,=-and it consists in certain novel features in the construction ofthe secondary clocks to be hereinafter described with reference to theannexed drawings, in which- Figure 1 represents a rear elevation of asecondary clock embodying my invention, part being broken away. Fig. 2is a side view of the same. Fig. 3 is a front elevation of a modifiedform, and Fig. 4; is a side view of Fig. 3. Fig. 5 is arear elevationshowing the pendulum and verge rod disconnected.

Similar letters of reference designate correspondingpartsthroughouttheseveral views of the drawings.

I will now proceed to describe the construction of the secondary clock,reference being had for the present to Figs. 1 and 2 of the drawings, inwhich the letter .9 designates the arbor of the pallet lever, 19, thependulum, and i the verge rod. The connection between the pendulum andthe verge rod is made in such a manner that it can be broken while themovement is in operation and the pendulum continues to swing, while theverge rod is held stationary and the motion of the train consequentlyarrested. To this end the verge rod, instead of terminatingin afork, asusual, has pivoted thereto a lever 7c Z, the bent arm of which extendsthrough an opening in the pendulum rod and engages with a horizontal pin13' made fast in the pendulum rod. Since normally the bent arm 70partially embraces the pin 19, and the arm Z being weighted, anoperative connection is established between the verge rod and thependulum rod. Beneath the lever 7t Z is located a lever d, mounted upona rock-shaft f and carrying at one end an armature e arranged oppositeto an electromagnet E. The opposite end of armature lever (Z carries atooth g arranged opposite to the arm Zof thelever 7.: Z, which arm istoothed for apurpose hereinafter to be described. On

the rock-shaft f is also mounted an arm h having at its end a nose harranged opposite to the periphery of a cam I) mounted on one of thearbors of the train. The cam is so set with respect to nose It that onlya limited motion of lever d is permitted to take place for some timebefore the hour ;-however when the hands of the clock are at the hour,atwhich period the nose 0 of the cam has passed below the nose h'-the armh, and consequently, lever d can be turned to the full extent.

In practice the secondary clocks are regulated to run fastsay from tento sixty seconds per day in case they are to be synchronized once a day.

The electro-magnets E of the several secondary clocks are included inthe circuit controlled by the master clock P, Fig. 5. The master clock,which maybe of any usual construction, has its circuit closer arrangedto close the circuit of the secondary clocks, at a short time-say sixtyseconds-before the hour as indicated by said master clock-and to breakit at the exact hour.

Assuming the case that the secondary clock is thirty seconds fast, andthat the circuit at the master clock is closed at one minute of the houras indicated by said master clock. The secondary clock being thirtyseconds fast at this period, the hands of said secondary clock are atthirty seconds of 12. The position of cam b prevents the verge rod frombe ing disconnected from the pendulum; when, however, the hands of theclock (secondary) point to 12, this disconnection takes place and themotion of the secondary clock is arrested Fig. 5. At 12 oclock, asindicated by the master-clock the circuit through electromagnet E isbroken and the connection of pendulum rod and verge rod reestablished bythe release of the latter.

The disconnection of pendulum and verge rods is effected by tooth g oflever d engaging with the toothed arm Z of lever 70 Z, and holding saidlever while the pendulum, in view of its inertia, continues tooscillate. If

at the instant that tooth g engages with the arm Z, the pendulum is notat the end of its vibration to the right of Fig 1, the next succeedingvibration in that direction forces the Verge rod outwardly where it isthen held stationary. When the tooth g releases arm 70 Z, the latterturns about its pivot and again engages pin 19.

In the modification illustrated in Figs. 3 and 4, I have shown theverge-rod 2' constructed to engage with the pendulum rod fromonesidethereof and tobe retainedagainst the latter under ordinary conditions bya Weighted arm n attached to the arbor of the pallet lever. To the vergerod is secured an armature m adapted to enter the solenoid D. As before,the master clock closes the circuit at some time before the hour (12oclock) as indicated by said master clock. The solenoid D is, however,cut out of the circuit until the hands of the secondary clock reach 12m. by means of the circuit closer usually provided for this purpose.WVhen the hands of the secondary clock reach 12 m., the circuit iscompleted through solenoid D and the armature 'm is attracted, therebydisconnecting the verge rod from the pendulum. At the hour (12 m.) asindicated by the master clock, the circuit is broken by the latter;solenoid D is devitalized and the verge rod again connects witl thependulum rod. Y

What I claim as new is- 1. In a clock system, a master clock, combinedwith a secondary clock (one or more) having a separable connectionbetween the verge rod and pendulum and devices, as dethe pendulum, anarmature lever cZ adapted to engage with lever 70 Z, an electro-magnetarranged to act on lever d, and a cam 6 adapted to control the motion oflever d, substantially as described.

3. In a time piece, the combination with the pendulum, a verge rodprovided with a pivoted lever 76, Z, one arm 7c of which is bent andengages a pin on the pendulum rod, and the other arm Z is provided withteeth, an armature lever cZ adapted to engage with the teeth on arm Z,an electro-magnet arranged to act on lever d, a cam 12, and an arm h hadapted to engage said cam, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LU'DWIG VON ORTH.

\Vitnesses:

ADOLF FRANKE, GUSTAV HtiLsMANN.

